Who would have thought Kristen Stewart and Anne Hathaway were in a BAND!? Oh no, wait, they're not.

But the pair have taken on the roles of two moody female musicians before dressing in drag for a hilarious new promo for the single Just One Of The Guys by singer Jenny Lewis.

The Hollywood stars are joined by actress Brie Larson in the video and mime the words to the song, dance around with instruments and pout, before changing into tracksuit bottoms, caps and fake moustaches to break-dance. It's a bit weird, but it's pretty funny to watch.

(Photo: GQ)

We LOVE the song and they switch it up from all-white tailored suits before becoming 'one of the guys'. To be honest, Twilight star Kristen doesn't look all that different to when we've seen her walking through LAX in a cap and jogging bottoms (we're only joking, Kristen) but seeing Anne attempt to break-dance in an Adidas tracksuit before falling over is quite something.

(Photo: GQ)

This video will having you crying with laughter and you'll also want to steal some of the looks (not the tracksuits), while Kristen is still rocking that Paramore-inspired orange hair.

Talking about the video, Jenny told GQ: "We screamed with laughter all day, huddled behind the monitor. I haven't laughed that hard since What About Bob? came out on laser disk."

She added: "The rat-tail was all Annie . Deep character exploration. Her dude is a bit more Backstreet Boy than the rest. Melancholy Backstreet Boy is what I think she was going for - he really feels things deeply."